How do I implement a listener pattern over RMI using Spring?
- by predhme
So here is a generalized version of our application desgin:
@Controller
public class MyController {
@Autowired
private MyServiceInterface myServiceInterface;
@RequestMapping("/myURL")
public @ResponseBody String doSomething() {
MyListenerInterface listener = new MyListenerInterfaceImpl();
myServiceInterface.doThenCallListener(listener);
// do post stuff
}
}
public interface MyListenerInterface {
public void callA();
public void callB();
}
public class MyListenerInterfaceImpl implements MyListenerInterface {
// ... omitted for clarity
}
public interface MyServiceInterface {
public void doThenCallListener(MyListenerInterface listener);
}
public class MyServiceImpl {
public void doThenCallListener(MyListenerInterface listener) {
// do stuff
listener.callA();
}
}
Basically I have a controller that is being called via AJAX in which I am looking to return a response as a string. However, I need to make a call to the backend (MyServiceInterface). That guy is exposed through RMI by using Spring (man that was easy). But the service method as described requires a listener to be registered for invokation completion purposes.
So what I assume I need to achieve is transparently to the backend make it so that when the listener methods are called, really the call is going over RMI.
I would have thought Spring would have a simple way to wrap a POJO (not a service singleton) with RMI calls. I looked through their documentation but they had nothing besides exposing services via RMI. Could someone point me in the right direction?
